Botanical name: Cardamine occulta    Family: Brassicaceae (Mustard family)
Synonyms: Cardamine flexuosa var. occulta, Cardamine hamiltonii

Asian Bittercress is a low but upright plant, normally well under a foot high but taller in marshes. Flowers are white, about 2.5-4 mm across. Stem arises from basal rosette of leaves that have about 5 roundish stalked leaflets on each side and a larger one at the end. Stem leaves are similar but smaller and often with narrower leaflets. Flowers normally have 6 stamens, of which 2 may or may not be smaller than the others. A closely related flower, Hairy Bitter Cress normally has 4 stamens. Ripe pod is about 1.2-2.5 cm long. Asian Bittercress is native to China to Japan and Tropical Asia.

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The flower labeled Asian Bittercress is ...